VS 2005 - DGV Row Updates And Filters - Error: Column Named Cannot Be Found
Sep 8, 2011
Scenario: FormA has a DataGridView with a DataTable as it's DataSource. The DefaultView of the DataTable is set to a particular filter, say "UnitFreight < 2.00". The user selects multiple rows then selects a context menu item to open up form2. Form2 does a bunch of stuff and in this example it will change the UnitFreight value in the selected rows on form1 to say 2.27. It also raises an event in form1 to adjust attribute cells such as UnitPrice.
The issue is that doing the above example puts the selected rows out of the range of the applied filter and I believe this is the issue because I end up getting a "Column named UnitPrice cannot be found" error. This is happening during the update of those attribute columns. I'm guessing the row has been filtered out so there's no column to be found. If I do the update without the filter applied it works fine. So my question is, what's the best approach to updating the data in this situation. I've started converting the updates to work against the DataTable directly instead of the DataGridView.
i have 2 computers - a Server and a Client pc which is running on local area network with MICROSOFT SQL SERVER 2008 R2 Developer kit at the main pc and Client computer will need to connect to SQL SERVER at main pc using connection string.Let me named server computer as 'MAGNA-PC' and the client pc as 'LAC-PC' and database name is 'db_referafriend' so the code for MAGNA-PC(server) connection string is:[code] i GOOGLE and YOUTUBE for almost 2 weeks before i post . I know that i need to configure the sql configuration manager and enable tcp/ip also add a new port at firewall to allow remote connection also add the sqlserver.exe and sqlbrowser in firewall and I have also chosen "Using both TCP/IP and named pipes" under Remote Connections in the SQL Server 2005 Surface Area Configuration. and all of this doesnt work!
I have a function that searches AD for members of various groups. If I remove the loop, I don't get the error "A column named 'cn' already belongs to this datatable", however, I need to iterate through each OU.
Function getCOMDLNames(ByVal searchStr As String) As DataTable Dim MySearchRoot As DirectoryEntry = New DirectoryEntry("path", "usr", "pwd") Dim MyDirectorySearcher As New DirectorySearcher(MySearchRoot)
I have a dgv and in it the user can move around column's or resize columns or filter columns. Now there's an issue when the user try's to move the column's around because you have to click on the column and drag it over. But once you click on it, it sorts that column in ascending (or descending) order.
I am having problems finding an named object declared in XAML in my codebehind file.I want to initalize a ViewModel from inside my View. However I also need a reference to the ViewModel in my code behind file (basically for navigation support, handling events, etc. that I cannot do easily from my ViewModel)[code]However I get a null reference exception when I'm trying to access the ViewModel in my code behind:[code]Some more research shows that the FindName call for "ViewModel" in InitalizeComponent returns null. I tried reading up on XAML namescopes etc. but as far as I see, this should be a simple case and just work, no?
I'm designing a form wherein a datagrid is being filtered from numerous controls.
The issue im having is each filter overrides the previous one. Just wondering the best way to approach this problem.
Heres a snippet of my
Private Sub MakeIDComboBox_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MakeIDComboBox.SelectedIndexChanged Sheet1BindingSource.Filter = "Make like '" & MakeIDComboBox.SelectedItem & "'" End Sub
I am attemting to read a .txt file database into an xml file and then read the xml file into a DataSet and then bind the dataset to bindingSources and then subsequently bind comboboxes and text boxes to the binding source. I am struggling with how to create bindingsources with different filters. I am not sure if I am even going about this the right way. Perhaps there is a better way. I already have the program working using traditional OLEDB and creating different datatables but I wanted to be able to add and edit my datafile so I decided to convert it to a xml file.
HTML If Me.OpenFileDialog2.ShowDialog() = Windows.Forms.DialogResult.OK Then With OpenFileDialog2 folderName = .FileName.Substring(0, .FileName.LastIndexOf("")) 'fill dataset with selected xml table [Code] .....
I have the code below and would like to sharpen the image in the increments of 10% starting at 0% to 100%. How do i apply separate filters so that when i move the track bar, i am able to see the effects take place step by step?
Private Sub TrackBar1_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackBar1.Scroll Dim sharpness As Single = CSng(TrackBar1.Value / 100) ' no change in brightness
I would like to sharpen an image using pure vb with no filters or unsharp method.Then use a track bar to slide through so that the image in the second picture box shows the effects of sharpening, up and down. I have the code below but it gives me errors:
Private Sub Sharpen() Dim fpixel, secpixel As Color Dim NewImg As Bitmap = New Bitmap(PicBefore.Image)
I'm trying to develop an app to import a spreadsheet into an Access 97 database. I'm using Visual Studio 08. I'm stuck on the first step! I'm trying to use the Data Source Configuration Wizard to connect to the database, and when I get to the point where I choose which tables to add, I get the following error:
<COPYtblMHPuse>
Could not get column information for database object named 'COPYtblMHPuse' This is for any table I try to add.
I have a table named fec in which i hv column named EndDt having Date/Time Data type.Now i want to display those records in my report which have EndDt less than Date i pick from DateTimePicker and month is current month.Private Sub DtpDefault_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DtpDefault.ValueChanged
this code below it gives me this error "error: Incorrect integer value: '' for column 'MPotProspect' at row 1"
[code]...
this give me another error "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1/" another way i tried when i highlight the myDatarow.Item(8).tostring and see what is inside there no data found.. but the other from mydatarow 7 to 1 there is data.. but in the database all of the fields including mydatarow(8) has data inside... why in mydatarow(8) when the program run it turn to null... may be the will cause the error...
I'm trying to add a computed column to a datatable that references another column in the datatable. Sometimes the computed column has a mathematical operation applied to it, but in this case I'm just referencing the original column. The code looks like the following:
The code isn't actually hard coded as shown above - there are functions that return the values for the first and third parameters - but I checked those and they are returning the expected values and not generating any errors themselves.
The error is thrown when the .Add method is called, and the error states "Syntax error: Missing operand after '_1' operator." It seems to me that it doesn't like the column name, which I suppose I could change and just workaround it at the presentation level. Still, I'm curious. Is this a bug in the .net framework or something? It doesn't mind "1_1" as a column name in the datatable, so why is it having a problem with it in the expression statement?
How do I set button1.image to the image resource named in a string? if my_string = "image1" then button1.image = my.resources.image1 else if my_string = "image2" then button1.image = "image2" ... else if my_string = "image30" then button1.image = "image30" end if Is there an easier way to do this?
I remember seeing a tutorial a while ago about making your application check online for updates..I did this a year or two ago but have since lost my example. Can someone explain how you do this or supply me with a link if you know a good tutorial?
I need to create 3 folders (named as In,Proc,Error) in C:Ram directory. First I need to check for folder existence in directory. If any of them not present need to create missing folder. If all missed need to create all 3. Could anyone suggest a simple looping code in VB.NET for this requirement .
I am facing another error "An error occurred trying to load the page. Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND) )" performing the following scenario:- Opened a sample VS 2010 WPF project that I receiveved from a co-worker (Project compiles, and run on his machine)I tried to open project properties (Project --> Properties)The project properties panel/window didn't open, all it had was an error symbol (red/white X) and the error message above(HRESULT: 0x80020003).I am unable to view niether the designer window nor the code window (no messages are reported) but the pane where the code/design shoud display is empty, all you can see is the background color.
Dim mysqlconn As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=.ccsinventory.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True") Dim myinvdataadapt As New SqlDataAdapter("SELECT * FROM inventory", mysqlconn) Dim myinvcmdbld As New SqlCommandBuilder(myinvdataadapt)
[code]....
Why does this not work and why am I getting this error?I am under a deadline of less than 20 hours to get it working.
I am getting this error:{"An attempt to attach an auto-named database for file D:WORKDocStoreDocStoreDatabaseDocStore.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."}
I verified the file exists and is checked out for edit. This is in my app.config:
This is something that's been bugging me for a while. Say I have a dgv with several columns and rows of data. Many times while working with the grid, it's necessary to know the number of the column, but all you know is the column header name, or vice versa. Is there any internal command that will return these values, or is there at least a better solution to the problem than making a function that loops through every header name until you find the one you want? It just seems so inefficient.
This webservice is almost converted form VB to C#, except I get this error shown below on the DataRow arow object when I use it in the foreach statement below to populate the Results Class with a DataSet Object...
Error: A local variable named 'arow' cannot be declared in this scope because it would give a different meaning to 'arrow', which is already used in a 'parent or current' scope to denote something else
using System; using System.Web; using System.Collections;
i am using an application which will call .bat file from a path..previously it was fine,.. but now it is showing "file not found".. didnt changed anything.. file exist in the same apth.. need some tipsCall Shell(App_Path & "start.bat", AppWinStyle.Hide)
I'm trying to copy files to the CD Drive using My.Computer.FileSystem.CopyFile. I use the FolderBrowserDialog for my destination and add the filename at the end. When I try this on the Hard Drive and also a flash drive, it works just fine, but when I try this on a CD Drive, I get the following message: Could not find part of the path 'E:'. Hw to copy movie files to CD Drive.
